Perhaps I’m just trying to get back into things…but lets start off the supposed revival of flashladybug with a repost.
I only recently, and I mean *recently* discovered the true usefulness of Synergy.
I posted this waaaay back in December, ’08. Reaaaly long time ago.
In any case, I tried this up on my desktop and laptop, stuck them side-by-side. My current setup is Left Panel, Center Panel, Laptop Display.
With synergy, I essentially have a 3 panel desk! The only thing that is missing is that I cannot move windows between the desktop and laptop screen. They are working on that, and I gotta admit, if they succeeded in doing that somehow, this would be quite an app.

In anycase, brief summary: Lets you share the use of a mouse and keyboard across computers, regardless of platform/OS. Copy paste is retained between the machines, and it works with almost no lag on a wifi network.

Synergy could be the easy way of adding productivity without having to shell out for a new video card and monitor 😛